, deception, and dirty secrets. jody arias has broken down on the stand. she's been on the stand for 13 days now. the whole time, until today, calmly and coolly talking about the most intimate details about her relationship with a man named travis alexander, a man she admits killing in 2008. so much of her testimony has been about phone sex and textt messages, but today, it focussed on the day she actually killed alexander. shot him, stabbed him 29 times, slit his throat from ear to ear. the prosecution is trying to show she intended to kill him all along. she said it was in self defense, but remember, she changed her story twice before, saying she wasn't near his house, and then tellingon anyone who would listen that masked intruders were to blame. after all that tawdry preamble, after 13 days, the prosecutor grilled arias today about the killing itself. that's when her unflappable demeanor finally cracked. we warn you, the story contains graphic photos and testimony. >> tears from jodi arias. she broke down on the stand as the first photo of travis alexander's body was displaced in court.